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  • × author_ss:"Wellisch, H.H."
  • × language_ss:"e"
  • × year_i:[1970 TO 1980}
  1. Wellisch, H.H.: UDC: present and potential (1974) 0.01 
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    Source
    Drexel library quarterly. 10(1974) no.4, S.75-89
  2. Wellisch, H.H.: ¬The Universal Decimal Classification : a programmed instruction course (1970) 0.01 
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    Imprint
    College Park, Md. : Univ. of Maryland. School of Library and Information Services

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